d56deea1e4
Update initial construction to connect the Plan's entry to the scalar preheader during initial construction. This moves a small part of the skeleton creation out of ILV and will also enable replacing VPInstruction::ResumePhi with regular VPPhi recipes. Resume phis need 2 incoming values to start with, the second being the bypass value from the scalar ph (and used to replicate the incoming value for other bypass blocks). Adding the extra edge ensures we incoming values for resume phis match the incoming blocks. PR: https://github.com/llvm/llvm-project/pull/140132
46 lines
1.7 KiB
LLVM
46 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; RUN: opt -passes=loop-vectorize -S -force-vector-width=4 -enable-interleaved-mem-accesses=true -debug-only=loop-vectorize --disable-output < %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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; This test checks if an unused interleave group is removed by removeDeadRecipes.
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%struct.foo = type { ptr, ptr }
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define void @test_unused_interleave(ptr %src, i32 %length) {
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; CHECK-LABEL: Checking a loop in 'test_unused_interleave'
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; CHECK: VPlan 'Initial VPlan for VF={4},UF>=1' {
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; CHECK-NEXT: Live-in vp<%0> = VF * UF
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; CHECK-NEXT: Live-in vp<%1> = vector-trip-count
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; CHECK-NEXT: Live-in ir<%length> = original trip-count
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; CHECK-EMPTY:
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; CHECK-NEXT: ir-bb<entry>:
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; CHECK-NEXT: Successor(s): scalar.ph, vector.ph
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; CHECK-EMPTY:
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; CHECK-NEXT: vector.ph:
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; CHECK-NEXT: Successor(s): vector loop
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; CHECK-EMPTY:
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; CHECK-NEXT: <x1> vector loop: {
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; CHECK-NEXT: vector.body:
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; CHECK-NEXT: EMIT vp<%2> = CANONICAL-INDUCTION ir<0>, vp<%index.next>
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; CHECK-NEXT: EMIT vp<%index.next> = add nuw vp<%2>, vp<%0>
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; CHECK-NEXT: EMIT branch-on-count vp<%index.next>, vp<%1>
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; CHECK-NEXT: No successors
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; CHECK-NEXT: }
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entry:
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br label %for.body
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for.body:
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%iv = phi i32 [ %iv.next, %for.body ], [ 0, %entry ]
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%next19.i.i = getelementptr inbounds %struct.foo, ptr %src, i32 %iv, i32 0
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%load_p1 = load ptr, ptr %next19.i.i, align 4
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%arrayidx15.i.i1427 = getelementptr inbounds %struct.foo, ptr %src, i32 %iv
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%val.i.i = getelementptr inbounds %struct.foo, ptr %arrayidx15.i.i1427, i32 0, i32 1
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%load_p2 = load ptr, ptr %val.i.i, align 4
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%iv.next = add nuw nsw i32 %iv, 1
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%cond = icmp eq i32 %iv.next, %length
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br i1 %cond, label %for.end, label %for.body
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for.end:
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ret void
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}
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